Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/92—Measuring, controlling or regulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
  • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
  • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
  • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92019—Pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92038—Torque
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92047—Energy, power, electric current or voltage
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92085—Velocity
  • B29C2948/92095—Angular velocity
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/9218—Weight
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/922—Viscosity; Melt flow index [MFI]; Molecular weight
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92209—Temperature
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92009—Measured parameter
  • B29C2948/92247—Optical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92323—Location or phase of measurement
  • B29C2948/92361—Extrusion unit
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92514—Pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92533—Torque
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92542—Energy, power, electric current or voltage
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92695—Viscosity; Melt flow index [MFI]; Molecular weight
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92704—Temperature
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2948/00—Indexing scheme relating to extrusion moulding
  • B29C2948/92—Measuring, controlling or regulating
  • B29C2948/92504—Controlled parameter
  • B29C2948/92742—Optical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
  • B29C48/08—Flat, e.g. panels flexible, e.g. films
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
  • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Definitions

• the present invention relates to a process for the indirect determination of a specific formulation in an extrusion process in an extrusion apparatus and to an extrusion apparatus for producing an extrusion product.
• extrusion products are produced by means of extrusion devices. It may be z. B. to foils or blown films or cast films, etc., which are produced with an extrusion Vornchtung.
• a Extrusionsvornchtung in particular an extruder screw, in which an associated recipe is melted and promoted.
• an extrusion apparatus may of course also comprise more than one extruder screw, in particular a plurality of up to thirteen individual ones Extruder screws have.
• the requirements for extrusion products have risen in many ways, so that in particular multi-layered extrusion products z. B. should be equipped with a variety of barrier properties for the film. For this purpose a variety of materials are necessary to form the individual layers of the extrusion product.
• each specific extrusion product is provided with a specific material recipe.
• Such a specific recipe can therefore any number of individual materials between a single material and a variety of z. B. up to 65 materials.
• melt flow index melt flow index
• a method according to the invention serves for the indirect determination of a specific recipe in an extrusion process in an extrusion apparatus. Such a method comprises the following steps:
• the core of the present invention is the indirect determination of the specific formulation via the determination of measurement data of at least one process parameter.
• a driving parameter is, for example, a machine parameter and / or a process parameter.
• An extrusion device is operated with a variety of settings.
• physical process parameters in the form of temperatures or temperature curves, force curves, power consumption or pressure ratios are process parameters that are specific for the extrusion device with respect to the particular formulation used at different points or over different flow paths.
• a first specific recipe is processed at different temperatures in the extrusion apparatus than a second specific one Recipe.
• a higher viscosity specific formulation will produce higher resistance and consequently higher torque in an extruder screw than a lower viscosity specific recipe.
• the inventive comparison between the measured data and the memory data of the same process parameter can be performed.
• the comparison with a predefined deviation threshold can ensure that material fluctuations are admissible in a permissible manner within a specific formulation.
• the determination of the measurement data of at least one method parameter and the further procedure according to the invention must be equated with a data-specific fingerprint of the specific formulation with reference to the extrusion device.
• This specific fingerprint refers to a specific recipe for the specific extrusion device. The more different process parameters can be determined, the finer the resolution of this fingerprint becomes and the more likely it is that the specific recipe will be determined.
• this method is used for the consistent and preferably continuous monitoring of the extrusion device during the extrusion process. In this way not only the basically set specific recipe can be checked for correctness, but also the course of the correctness of the recipe can be monitored during the extrusion process. In particular, a characteristic is recorded, as will be explained in more detail later.
• monitoring by the determination can already take place during production, ie in particular already in the extrusion apparatus. Possibly existing errors based on fluctuating raw material quality and / or raw material composition with an unacceptable negative effect on the quality of the product are already recognized in the production process in this way. This allows the process to be interrupted early so as to significantly reduce the amount of waste produced. Also can from the The generated fingerprint of the identified specific recipe can be drawn on the raw material in the entire composition, which is responsible for the error with high probability. This leads to faster troubleshooting and thus reduced downtime of the extrusion device.
• the method according to the invention can thus represent in particular a supplement or replacement of those incoming goods inspections of the raw material supplied, which are used for the detection of batch fluctuations.
• the evaluation of the process parameters of the extrusion process offers significantly more accurate possibilities.
• increased viscosity has a direct influence on the torque of the extruder drive, on the shear heating introduced into the melt and thus on the required heating power of the extruder cylinder and the resulting melt temperature, as well as on the pressure losses of individual throughflow channels. Deviations of such parameters mentioned here only by way of example allow a direct inference to batch fluctuations by comparison with data from the production history.
• the extrusion process according to the present invention is used in particular for film extrusion.
• a blown film extrusion or a cast film extrusion is provided.
• the filling characteristic of an original container is used as at least one method parameter for the determination of the measured data, in particular via a relation between the weight taken and the volume removed in a unit of time, the bulk density being determined as measured data.
• a storage container can, for. B. serve to combine a continuous promotion of an extruder screw with a discontinuous filling of the storage container.
• a minimum level and a maximum level are monitored by sensors. Reached by the removal by means of the extruder screw, the level of the storage tank the minimum, the storage tank is refilled with material. As soon as the fill level of the receiver tank has reached its maximum value during refilling, refilling stops. In addition, will monitored the weight of the storage container.
• the volume removed between the minimum value and the maximum value of the loading of the storage container can be determined.
• the bulk density is preferably calculable, which reproduces a process parameter as a measurement date.
• This bulk density in turn correlates z. B. with the recorded in the storage container material.
• the material can be monitored for both its chemical and physical properties. In the case of a bulk density z.
• an extrusion device according to the invention may comprise a plurality of storage containers, which are all formed in accordance with the invention.
• a method according to the invention can be developed such that the ratio between the rotational speed and the torque of an extruder screw of the extrusion device is used as at least one process parameter for the determination of the measured data.
• the selection of a specific recipe results in shear forces in the extruder screw, which depend on material properties. Depending on the speed with which a motor drives the extruder screw, this results in a necessary torque to reach this speed.
• the necessary torque must overcome the resistance forces applied by the material or the formulation and thus also gives an indication of the material conveyed in the extruder screw.
• the ratio between speed and torque thus refers to the material or the recipe, which is promoted with this ratio in the extruder screw of the extrusion device.
• the at least one process parameter for the determination of the measured data is the temperature profile over the axial course of an extruder screw of the extrusion apparatus.
• the temperature profile is particularly dependent on the material used and the shear forces introduced by the extruder screw. The shear forces generate frictional forces in the material, which bring about an increase in temperature.
• the temperature profile can be further influenced by temperature control devices, such as cooling or heating devices on the edge of the extruder screw. The self-adjusting temperature profile can thus allow conclusions about the subsidized and sheared material in the extruder screw. It is also possible that an existing temperature profile is reached or not achieved, so that this failure or achievement of the specification also allows a comparison between memory data and measured data.
• the power consumption of at least one electric temperature control device is used as at least one process parameter for the determination of the measured data.
• a desired temperature profile over the axial course of the extruder screw is given to perform the extrusion process.
• the shear forces generated are sufficient to achieve this temperature profile or else it must be reheated or cooled if the temperature rises too high.
• This subsequent tempering in addition to the shear forces is achieved via temperature control devices in an electrical manner.
• By monitoring the power consumption it is ensured that a deviation from the expected expense for the electrical temperature control is detected. In the case of these measured data, a clear inference of the material mixture contained in the extruder screw or the corresponding formulation is also possible.
• melt temperature at the tip of an extruder screw of the extrusion apparatus is used as at least one method parameter for the determination of the measured data.
• This melt temperature is to be distinguished from the melting temperature of the material or formulation used. So will in the course of promotion by the extruder screw increase the temperature of the conveyed formulation by the shear forces and any existing electrical tempering, so that a melting takes place. In particular, overheating will take place, which in turn has an influence on the viscosity of the conveyed material. At the top, therefore, a melt temperature will set, which also brings conclusions about the recipe composition or the funded material with it. This determination of these process parameters is of great advantage since it is particularly cost-effective and easy to measure only a single temperature sensor at the extruder screw tip.
• At least one process parameter for determining the measurement data is the melt pressure at the tip of an extruder screw and / or the melt pressure loss over a defined melt channel geometry of the extrusion device.
• This melt pressure depends on the subsequent pressure loss of a nozzle after the extruder screw.
• the extrusion device will dispense the liquid material via this nozzle and make it available for the production of the extrusion product.
• a different melt pressure will adjust at this peak.
• these measurement data are set in relation to the measurement data of the melt temperature at the tip of the extruder screw.
• the roll weight of a film web wound up on a winding roll is used as at least one process parameter for the determination of the measured data. It can be z. B. a reference to a length section, in particular the running meter, the wound film web are generated.
• the roll weight is preferably determined in subsections, so that even before the end of the method, a possible error can also be determined by these measurement data.
• a relative and / or an absolute comparison takes place.
• the particular weight of the winding roll can be related to the starting materials used to detect possible defects.
• absolutely the expected square centimeter weight of the film web can be predetermined and provided as a storage date to serve for comparison with corresponding measurement data.
• an absorption characteristic of an extrusion product is used as at least one method parameter for the determination of the measured data. In particular, this is done with regard to at least one of the following types:
• both the transmission and the reflection can be determined.
• a conclusion can also be drawn here on the formulation, so that these measurement data can also be incorporated into a method according to the invention.
• a further advantage can be achieved if, in a method according to the invention, a relative comparison of the viscosity, in particular based on the pressure loss in the extrusion apparatus and / or on the basis of the current consumption of the extrusion apparatus, is used as at least one process parameter for the determination of the measured data.
• a relative comparison of the viscosity in particular based on the pressure loss in the extrusion apparatus and / or on the basis of the current consumption of the extrusion apparatus, is used as at least one process parameter for the determination of the measured data.
• a characteristic curve is recorded, in particular over the course of production and / or over the course of a batch.
• raw materials are kept partially in silos, which are refilled when falling below a hypothesisyogllgrades from above. So it may be in the silo to mix different batches of one Raw materials come, especially from different suppliers.
• the characteristic curve is recorded batch-specifically for the production of a product and / or continuously via the production process of the extrusion device.
• a method according to the invention that is checked in a deviation of the measured data from the memory data, whether the deviation in relation to the requirements of the process, the raw material or the final product is allowed or not. It is also possible for the determined measurement data to be used in case of an impermissible deviation to confirm and / or refine and / or correct the defined deviation threshold values.
• measurement data are determined by a plurality of at least two different process parameters, wherein the deviations are correlated and / or added, in particular in a weighted manner.
• the fingerprint of a specific recipe can be more accurately determined.
• the largest possible number of process parameters is generated with measurement data, so that a particularly wide monitoring can take place.
• the individual deviations become so that a total deviation and therefore a single normalized measure is sufficient to trigger an alarm or determine the correct specific recipe.
• the individual process parameters and the associated measurement data can be weighted. The weighting can also be made to the corresponding deviations, so that the addition takes place in a weighted manner.
• an extrusion device for producing an extrusion product, comprising at least one sensor device and a control unit for carrying out a method according to the invention. Accordingly, an extrusion apparatus according to the invention brings about the same advantages as have been explained in detail with reference to a method according to the invention.
• An extrusion device according to the invention is used in particular for the production of an extrusion product in the form of a film, in particular in the form of a blown film or a cast film.
• FIG. 1 shows a first schematic representation of an embodiment of an extrusion device according to the invention
• Fig. 2 is a schematic representation of a step of a method according to the invention.
• FIG. 1 shows an embodiment of an extrusion apparatus 10 according to the invention, in which a method according to the invention can be used.
• this extrusion apparatus 10 has an extruder screw 30, which is supplied with material or a formulation of various materials via a feed container 20.
• a plurality of sensor devices 70 may determine measurement data on different process parameters at different locations of the extrusion device 10.
• z. B the storage tank 20 equipped with a sensor device 70 for gravimetric determination and level determination.
• a sensor device 70 At the right end of the extruder screw 30 is a sensor device 70, the z. B. can recognize the melt temperature and / or the melt pressure at this position.
• Also mounted on the right and downstream of the nozzle of the extrusion device 10 is a sensor device 70, the z. B. the absorption behavior of the extrusion product 60, z. B. in the form of a film web 62, can determine.
• FIG. 2 shows part of the embodiment of a method according to the invention. So z. B. determined via the sensor devices 70 according to the embodiment of Figure 1 for a variety of process parameters measured data.
• the measurement data of the individual process parameters of the extrusion process are here provided as the first process parameter V1 with the value 12.4 and as the second process parameter V2 with the value 120.1. It is indicated by the points that, of course, a larger number of process parameters can be supplied to the control unit 80.
• the control unit 80 compares the determined measurement data in a database 90 with storage data stored there, which are specific for individual formulations R1 and R2. As can be seen from this comparison, it must be due to the process parameters V1 and V2 to the recipe R1.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=50030293

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (9)

Citations (4)

Family Cites Families (16)

• 2013
  • 2013-01-29 DE DE102013100866.6A patent/DE102013100866B4/de active Active
• 2014
  • 2014-01-29 WO PCT/EP2014/051734 patent/WO2014118243A1/de active Application Filing
  • 2014-01-29 CN CN201480006154.XA patent/CN104955631B/zh active Active
  • 2014-01-29 US US14/764,189 patent/US10518460B2/en active Active
  • 2014-01-29 EP EP14702007.7A patent/EP2951000B1/de active Active

Patent Citations (4)

Non-Patent Citations (3)

Also Published As

Similar Documents

Legal Events